/Engine/Source/Runtime/Engine/Public/HLSLTree/HLSLTreeCommon.h
class FExpressionSelect : public [UE::HLSLTree::FExpression](API\Runtime\Engine\HLSLTree\FExpression)
constFExpressi...
ConditionExpression
constFExpressi...
FalseExpression
constFExpressi...
TrueExpression